Unreal Engine Issues

Parent Begin Play node does not appear to run the parent code class BeginPlay() function before the rest of the Blueprint's Begin Play functionality

If a Blueprint event graph contains a Begin Play node that connects to a call to the parent function, the functionality present in the Blueprint Begin Play segment is run before the parent Begin Pla ...

Cloth rendering issue on triangles sharing kinematic attachments.

All render vertices on any cloth triangle that contains one or two fixed vertex are set as fixed, whereas this should only be the case if all three vertices were fixed. ...

Some post-processing passes sample outside of the viewport when using scene capture components

It looks like the SSAO shader does not clamp its sample space to the half view size for the two inputs "Ambient Occlusion" and "AmbientOcclusionSetup", leading to invalid data entering the edge of f ...

BP class variables aren't created for component templates not loaded in an uncooked server build due to component class NeedsLoadForServer() API override.

See UDN thread for details. Essentially we need to ensure that class variables are created for SCS components even if the template isn't loaded as a result of a NeedsLoadForServer() API override. O ...

Destroying Actor via RepNotify After Seamless Travel Causes Pending Kill Warning

Attempting to destroy an actor via a repnotify after seamless travel is causing the actor to fail to be destroyed because of a pending kill warning: [2016.12.15-19.10.13:936][574]LogNetPackageMap:W ...

Calling DiscardPlayerInput() does not appear to actually discard the player's input

Calling DiscardPlayerInput() does not appear to actually discard the player input. The comment for the function indicates that input will be consumed and discarded without doing anything with it. Ho ...

Default value propagation of instance subobjects doesn't work consistently

bIgnoreAllPressedKeysUntilRelease behaves differently for triggers in EnhancedInputAction and triggers in InputMappingContext

For actions that are triggered on the Input mapping context, simply adding or removing an InputMappingContext with no related key override with the bIgnoreAllPressedKeysUntilRelease option will caus ...

Physics constraint component doesn't work when placed inside a child actor, while using world partition and streaming is enabled

Context: In a World partition level, to reduce complexity and provide a scalable solution when creating new projects, grid cell streaming can be enabled. Problem: The problem is that physics constr ...

Chaos sometimes can not generate contact points while two dynamic convex hulls actually collide. It results in instability in the contact behavior​ - such as jittering, inconsistent contact forces, or unexpected collision responses.

Context: Chaos Physics is able to use convex hulls to represent object collision geometry for queries and simulation. Problem: Chaos sometimes can not generate contact points while two dynamic conv ...